You have probably come here because you have a problem with headphones not muting the internal speakers when inserted (or with headphones not unmuting the internal speakers when removed), and someone asked you to provide a codec dump. Here's how to do that:

Open a second terminal, and enter this command while the speaker-test in the first terminal continues to run:

cat /proc/asound/card*/codec* > ~/codec.no_hp.txt

Wait until the speaker-test has finished.

Insert headphones into the appropriate jack, and repeat the first step with speaker-test.

In the second terminal, modify the second step as follows while the speaker-test in the first terminal continues to run:

cat /proc/asound/card*/codec* > ~/codec.hp.txt

Open your Launchpad bug and attach the files ~/codec.no_hp.txt and ~/codec.hp.txt (in your home directory) to that message.

To return your system to a clean state again, edit ~/.pulse/client.conf with your favorite editor and remove the line "autospawn = no". If the file is now empty, you can just as well delete it. Then log out and log in again.